Incandescent-lamp lock.



-J. A. GARDINER. INGANDESGBNT LAMP 1500K. APPLIOATIQN FILED JULY 11,1912.

A amma i? Patented Sept. 16, 1913.

' mifieaivasv UNI . J'QHN HENRY A. eannnvsr ex it all- 3 .i

'nfiit s81; yoke H me Gaeas? h jUhitedStates,..residingi ent ty-of Dupa'ge e invented certain ens; fem-gee hi; accidentally fdiseng heirifscckets and whic fiiftheriiiofe, loyedf to mp -m e; 'larrilish'a 'ie "hold 1''- a s tide ifd'esire ',"jand consists the fe atfur construction "and @mbi'naitioiis fof paiitsjf erein fi r fully 118-" scribedandfiartictilhrly,claimed; 2 e In the accompanying 'djawings illustratne'.-thsz eteetienn. s a v w in side elevation partly in section of an'ingandescent lamp lock and shade suppoeti igfix ture embodying :i'nyqnvention; Fig. is a similar view ofa fsnodified form of construction of the same. Fig. is a View in side elevation partly in section of a lampv 3-0 lock embodying my invention showing it inthe form in which it is'applicable to existing styles of lamp sockets anddevoid of lamp shade supporting means. Fig. '-'-4-- is a view in end elevation of the lamp lockshown inFig.-+3.

Incandescent, 'lai'nps' are apt to be. accidenta-lly disengaged from their sockets panticularly'in placeswhere they are subjected to constant,vibration;"as on board" cars of 40 all kinds. Many lampsare also stolen in isolated places and the object ofjmy. invene' tion is to provide a. device whereby'ma'nual' removal ofathellampsfrom their sockets is rendered difiicult and whereby accidental- 'disengageme'nt of the lamps from the sock ets is'entirely'prevented. v

' A further object of myinvention is to provide a locking device for incandescent lamps in which a non-conductive substance. is employed for engaging the lamp with the reventing' posbe hereinafter exterior of the socket thus sible short circuiting, as wil more particularly explained. RMy sa-i device comprises a. split ring 1 having projections 2 and 3 at its ends through fwhich the screws 4: are passed T ES.

. T-LAE??? iflan t ei'iisfi n e 0 1 I H I I v "ta ct'vvith thepuber faceof stump-$061M l richereby declare I v i therein" andsservinggi to preventfwithdraual i of the ring irbm s'aid socketbyineansof a relative-telescopic movement of said parts; 7 'Saidiringis further provided iii its circum-'- .ferential f'aceetintifvals with .concavo-icon- 'NERS GROVE, ILIEINOISQ 21 elem Ime'ms eehiehjssiar ngfma be'cen'tr'acted a wellkiietv i manner;- Th sdld 'il'fiilg is provided with annular inwardly extending edge flanges-'5 end? 6 res cti'velmfl'theseid 7 ewn-1mm.

ree'rwerdly' of v heed, 7 usually provided and f-contig'uous to'f thee g e fienge fi-there'o'f gind'betweenvvhich. and said edge flange?) a y l 'si t'r 'is'enlgaged. Said ring .9 is .05 greater w idthto receive the-lamp see,

flange:.5 'ha sfp'assedfby md said bead? of said- "socket -the same iscontracted to :a idefnom becoming? *disengnged from said socket'i The ring gree sufficient; to we est-1.. r.

being split elastic so that the lamp plug f eiieii-cond'aicting' -materiel.- 1 such as fi er, asbestosor' a s milar substance,"

than the depthof fiange fi soiha t its inner 'eircumferentiahfa'ceyesdis, osedyin:

ina freadil essthrough the same in bein end; after the lamp 11 has been firmly serotated-"as it is inserted intosa'id socket 10 1 curedwithin said socket 10, the saidring 1] is further contracted. so as to compress said ring-Qaroundthe lamp 11 at the juncture of the globe with the plug and to. firmly engege-thefla-nge b of said ring with the lamp socket. 'Whenthus engaged the ring 9 exerts a; meteor less yieldin pressure on the buIbWhich, howe'ver, i suit went, the disengagement of" the lamp there- 'frqmxeThe-saidmin 9 being of a non-conducting material asorevents the possibility "of a "short circuit being established cient to prebetween the shell 'o'f the .socket'ldand the vinteriorportion thereofies will be apparent. The pressure 'of the ring 9' upon the bulb of thelamp is also distributed-"over so large an area. as to prevent fracture of the same.

The said ring 1 may BSf equipped, as shown in'Fig. -1- with a lamp 'sl1ade-sup porting device 12 comprising the ring equipped with projections 13 in which the set screws I l-for engagingthe shade 15 are provided, the said ring'being further pro- 'vided "vvith a plurality of projections removalof said lamp thus secured by rivets 17 or other means to said ring 1.

Instead of employin'gga ring 1 my invenmay be embodied in the outer shell18 a lamp socket, as-shoivn in Fig. -2. 1e said. shell 18 is adapted to pass over-the mp. Socket base consisting of porcelain or ajaia'gher material in the usual manner andmay provided with the usual means for engaging the same with said base, such means bemg omitted from illustration. In its outerend said shell 18 is provided with a' longitudinal recess 1.9 extending inwardly from the outer end] thereof and which is bordered by the flanges 20 through which the screws 21' pass by means of which the outer or mouth portion of said shell 18 may be annularly contracted- Thesplit ring 22 of fiber or the like, is engaged in the annu lar recess 23 in the outer end portion of said shell'18andis adapted to project over the n'esses. v 4

. JOHN HENRY A-. ,GARDINERQ illustrated, identical with that shown in Fig. -1-. a

I claim as my invention:. The, combination with an incandescent electric lamp and its socket,'of means-engaged with both said parts for: preventing separation thereof, said means comprising an annular 'flexible member circumferentially expansi'oi-e, projections at the meeting ends of said member, set-screws enga therewith for circumferentially contracting thesaid member, asplit ring of a mmconducting material circumferent-ial'ly .ex-

pansible and contraotible independently of said flexible member, and means engaging the latter with said flexible member for preventing relative movement of said parts in the direction ofthe axis of said flexible member, but permitting relativecircu'mferf 'ent al expansion and contract-ion of said split ring adapted to permit the lamp base.

or socket tobe passed therethrough and'to fbulb around the juncture of said-parts.

In testimony whereof I have signed my I name in presence of. two subscribingmt- Witnesses: I

RUnoLrH WM. Lo'rz, THos. RConnrNs.

be contracted by contraction of said split'.

member o engage said lamp base and its- 

